I'm 75kgs and 170cm, so on a BMI scale I'm deemed overweight but I have a higher than average muscle mass and less than 15% body fat. I generally workout intensively 4-5 times a week, and can do a 5km run in 30 minutes and 100 burpees in under 12 minutes. So it isn't a fitness or conditioning issue. I'm 100% sure I had covid-19 February/March, as I lost my sense of taste and smell for weeks, was super fatigued, had some cold and sinusitis like symptoms. But I isolated for 3 weeks with that, and have since been isolated since back in the Welsh countryside. So I don't believe this is an after effect of COVID.

I went to the GP on Friday, as I wanted some form of action plan - my stomach was also feeling tender and upset. Went to the doctors, she believes its GERD that has moved up. She prescribed Lansoprazole, I've been taking for 5 days now - it's definitely better now than it was this time last week. But I'm severely hopeful that this will completely clear it. As I'm feeling slightly fatigued and lacking motivation to do my regular exercise. I challenged myself to start doing some lower impact stuff such as a 10km walk and yoga, my breathing was ok in these. So I'll try some weight and HIIT training today.